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Finding the Fourth Proportional to 150.49, 207.85 and 101.28

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Solution

The fourth proportional to 150.49, 207.85 and 101.28 is: 139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.49 : 207.85 = 101.28 : x
  2. Step 2: Convert to fraction form
    150.49/207.85 = 101.28/x
  3. Step 3: Cross multiply
    150.49x = 207.85 × 101.28
  4. Step 4: Simplify right side
    150.49x = 21,050.67
  5. Step 5: Solve for x
    x = 21,050.67/150.49
  6. Step 6: Final answer
    x = 139.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.